Electrical apparatus for transmitting and receiving signals.



A. T. DAWSON & G. T. BUGKHAM.

ELECTRICAL APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS.

APPLICATION FILED 00w. 20, 1911.

1,064,682, Patented June 10, 1913.

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ARTHUR TREVOR DAWSON AND GEORGE THOMAS BUCKHAM, OF WESTMINSTER,

LONDON, ENGLAND, ASSIGNORS TO ELECTRICAL APPARATUS FOR TRANSMITTING Original application filed November 26, 1906, Serial No. 345,231.

Specification of Letters Patent.

VICKERS LIMITED, OF LONDON, ENGLAND.

ANI) RECEIVING SIGNALS.

Patented June 10, 191.5.

Divided and this application filed October 20, 1911. Serial No. 655,663.

Receiving Signals, of which the following is a specification.

This application is a division of applicants prior application for Letters Patent filed November 26, 1906, Serial No. 34:5231.

Our invention relates to various improvements in electrical signaling apparatus of the kind set forth in the prior United States Patent No. 938830 for communicating from the conning tower of a ship or other fixed position the necessary information as regards range and deflection to a number of receiving instruments situated contiguous to the guns, so that the officer in charge can transmit such information from the conning tower to the sighting numbers of the various guns crews simultaneously.

The apparatus disclosed in the prior patent comprises a dynamo-electric transmitting instrument at the sending station and a dynamo-electric receiving instrument at each of the receiving stations. Each of the instruments is furnished with a counting device mechanically connected with its armature, which is caused to intermittently rotate in a magnetic field by electric impulses sent through the armature windings by the actuation of a rotary hand switch cooperating with segmental contacts at the sending station, the said instruments thus acting like electric motors for operating the counting devices. One set of instruments and circuits is used for sending and receiving the range signals and another set for sendin and receiving the deflection signals, eac transmitting instrument being provided with its own rotary hand switch.

According to the present invention the rotary hand switch of the transmitting instruments is so arranged in conjunction with special internal annular gearing that the speed of movement of the switch arm and therefore of the motorarmatures of all the instruments is reduced relatively to that of the movement of the crank handle actuating the switch. The switch arm and motorarmatures can thus be caused to rotate once for every two, three, four or other desired number of revolutions of the said crank handle.

In order that our said invention may be clearly understood and readily carried into effect we will proceed to describe the same more fully with reference to the accompanying drawings, in which Figure l is a front elevation partly in sec tion of an improved range transmitting apparatus. Fig. 2 is a plan of the same with the cover partly bro-ken away to show the interior. Fig. 3 is a cross section taken approximately on the line 2-2 of Fig. 2. Fig. t is an elevation showing a detached View of the rotary switch arm and the speed reducing gearing through which it is driven.

A is the casing of the range transmitting apparatus, of which A is the electric motor, A the counting device, and A the rotary switch arm which cooperates with the segmental contacts A as set forth in the prior patent referred to. A is the crank handle and a the crank spindle to which it is secured.

F is a terminal board situated removably in the end or side of the apparatus and carrying resilient contact pieces f which, when the terminal board is in place, form a resilient contact with terminal plates f attached to the underside of an upper terminal board F. These terminal plates are electrically connected with the motors and their armatures in the receiving instruments and with the motor and the rotary hand switch in the transmitting apparatus.

On the inner end of the spindle a of the crank handle A is a pinion a which gears with an inte mediate idle wheel a revolving on a stud pivoted to a gear plate a or cover supported by the said spindle and prevented from rotating by a tail a engaging with two stops a on the transmitter base. The idle wheel in turn gears with internal teeth on the rotary switch arm A By these means the said switch arm and consequently the motor armatures will rotate at a reduced speed relatively to that of the crank spindle a when the latter is actuated by its crank handle A What we claim and des re to secure by Letters Patent of the United States is 1. In electric signaling apparatus, 'the combination with a dynamo-electric instrument and a counting device mechanically connected thereto, of a hand switch compris ing electrical contacts connected to the armature windings of the dynamo electric instrument, a rotary switch arm cooperating therewith, a crank handle, a spindle carrying said crank handle, and internal annular reducing gear mechanically connecting the spindle and the rotary switch arm.

2. In electric signaling apparatus, the combination with a dynamo-electric instrument and a counting device mechanically connected thereto, of a hand switch compris ing said crank handle, a toothed wheel on 25 said spindle, teeth formed internally upon the switch arm and concentrically with the said spindle, a stationary cover plate, and an intermediate toothed wheel freely mounted.

on said plate and gearing with the toothed 30 wheel on the spindle and with the internally formed teeth on the switch arm.

In testimony whereof we aflix our signatures in presence of two witnesses.

ARTHUR TREVOR DAYVSON. GEORGE THOMAS BUCKHAM.

l/Vitnesses HENRY KING, Jim. R. GAswELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, 

